Environmental education has recommended by UNESCO four decades ago. Indonesian Government through Ministry for Environment Affairs and Ministry of National Education initiated an environmental education program as co-work program, called as Adiwiyata, for elementary and second education level school. Although, this program has ran for more ten years, it was found that many school facing problem in adopting curriculum and program. In Dumai city-Indonesia, State Senior High School (SMAN) 2 Dumai is projected to reach Adiwiyata School in national level, now the school remaining as Adiwiyata School in city level. As upgrading efforts to higher level, an assessment of the school preparation, program and progress to achieve national level is needed. This research give an evaluation of Adiwiyata program progress which adopted by SMAN 2 Dumai. We use qualitative and quantitative approachment in collecting all data through interviewing stakeholders, questionnaire, focus discussion group (FDG) and direct observation to evaluate environment-friendly behavior and program inside the school. Over all, the school has been conducted many efforts to fully adopt Adiwiyata program.